Schedule Of Consolidated Debt (Short-Term Liquidity) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011
Short-term Debt [Line Items]
Total Facility		$ 4,202
Available Liquidity		4,015
Facilities Reduced PSEG	23
Facilities Reduced	75
PSEG [Member]
Short-term Debt [Line Items]
Total Facility		977
Usage		12
Available Liquidity		965
Maximum borrowing capacity under line of credit	500	500
Power [Member]
Short-term Debt [Line Items]
Total Facility		2,625
Usage		175
Available Liquidity		2,450
Maximum borrowing capacity under line of credit	1,000	1,000
Terminated borrowing capacity under line of credit	350	350
Increase in line of credit		650
PSE&G [Member]
Short-term Debt [Line Items]
Total Facility		600
Usage		0
Available Liquidity		600
Maximum borrowing capacity under line of credit	600	600
Terminated borrowing capacity under line of credit	600	600
5-year Credit Facility, Dec 2012 [Member] | PSEG [Member]
Short-term Debt [Line Items]
Total Facility		477
Usage		12
Available Liquidity		465
Expiration Date		Dec 2012
5-year Credit Facility, Dec 2012 [Member] | Power [Member]
Short-term Debt [Line Items]
Total Facility		1,525
Usage		75
Available Liquidity		1,450
Expiration Date		Dec 2012
5-year Credit Facility, Dec 2012 [Member] | PSE&G [Member]
Short-term Debt [Line Items]
Total Facility		600
Usage		0
Available Liquidity		600
Expiration Date		Apr 2016
5-year Credit Facility, April 2016 [Member] | PSEG [Member]
Short-term Debt [Line Items]
Total Facility		500
Usage		0
Available Liquidity		500
Expiration Date		Apr 2016
5-year Credit Facility, April 2016 [Member] | Power [Member]
Short-term Debt [Line Items]
Total Facility		1,000
Usage		0
Available Liquidity		1,000
Expiration Date		Apr 2016
Bilateral Credit Facility [Member] | Power [Member]
Short-term Debt [Line Items]
Total Facility		100
Usage		100
Available Liquidity		$ 0
Expiration Date		Sept 2015